San TheBastion comes to an end - for now.
The last addition are some point defenses.
There are three kinds. Here are two of them together with some Marines for size reference.

All weapons are mounted on a slab of concrete, that fits into the battlement designed for the little towers with funny hats. With hint sight I would have designed a more universal mount like a lafette or a tripod.

The third type after (Gatling) and Big One (Battle Cannon or Earthshaker) is a Quad representing whatever is needed or just looking pretty. As you can see I forgot to darken the muzzle. I'll do it in a moment.
Another thing you might notice is that the barrels look twisted. Never had an effect like that before. I will print some more when I have some space left on a build platform. Things like this show that "home 3D printing" hasn't reached the predictability of "home 2d printing".

The models are printed in 100µm horizontal and 50µm vertical resolution and it shows especially in the curved sections of the Big Ones. Surprisingly I do not find it disturbing. It gives the gun a technical-artificial flair, which suits it quite well.
Please do not forget that these are very close shots. The Qua is on my screen 4 times as large as the original. So every imperfection is blown up and you see things otherwise you'd most likely never realize.
Surprisingly im still in the gourmand phase - I hoped to have reached the gourmet phase up to now.
But I'm still like possessed and want to make a lot of new good-enough models, instead of concentrating on a few and make them perfect. That's why I will investigate the twisted barrel while I do something new instead of concentrating on exploring the phenomenon.
So there will be no additions to the fortress in the near future, as I switch to a new topic.
Hopefully I will have to show something at the end of next week. The first models are designed, but the motor moving the Vat screeched and I have desected it. Luckily it proofed to be just some missing oil and nothing more serious. Still taking printer and motor apart already took an hour and cleaning, oiling and reassembly will take another one or two hours and it's already 2 o'clock in the morning.
In moments like these, I doubt that 3D printing for the masses is around the corner.
BlindHorizons comment intrigued me enough to order some models from shapeways to compare quality.
I'll post the comparison on my website, once it is done. But it will take at least 8 days to get the parts to Germany - seemingly delivery within the States is much faster.
Happy Easter